Question

Why the size of atom dosn,t decrease regularly in a period?

Answer 1

Answer:

The size of an atom does not decrease regularly in a period there is no increase in shells.

Explanation:

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Answer 2

The size of atom doesn't decrease regularly in a period because it doesn't radiate its energy. If an Aston was radiating its energy than it must've rapidly fall into the nucleus.
There is a fixed path ( known as shells ) in which an atom revolves around. Atom with low radiation moves in 'K SHELL' which is the first path located near the nucleus and the first shell consists of 2atoms only.

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